(19)

(11)

EP 0 221 054 A1

(12)

(43) Date of publication: 13.05.1987 Bulletin 1987/20 (21) Application number: 85902743.0 (22) Date of filing: 02.05.1985

(51) International Patent Classification (IPC):  E04C 3/ 08( . ) E04C 3/ 04( . ) (86) International application number: PCT/US1985/000799 (87) International publication number: WO 1986/006431 (06.11.1986 Gazette 1986/24)

(84) Designated Contracting States: AT BE CH DE FR GB IT LI LU NL SE (71) Applicant: DONN INCORPORATED Westlake, OH 44145 (US)	(72) Inventor: SHIREY, Richard Avon, OH 44011 (US)